import logging
from django.db import DatabaseError
from redis import RedisError

from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import exception_handler as drf_exception_handler



# 获取在配置文件中定义的logger，用来记录日志


logger = logging.getLogger('django')

def exception_handler(exc,context):
    '''
    自定义异常处理
    :param exc: 　异常
    :param context: 　抛出异常
    :return: Response 响应对象
    '''

    # 调用drf 框架原生的异常处理方法
    response = drf_exception_handler(exc,context)

    if response is None:
        view = context['view']
        if isinstance(exc,DatabaseError) or isinstance(exc,RedisError):
            # 数据库异常
            logger.error('[%s] %s' % (view,exc))
            response = Response({'message':'服务器内部错误'},status=status.HTTP_507_INSUFFICIENT_STORAGE)

    return response